David Howell had the bishop pair, but Luke McShane held firm. Later, towards the time control, Howell badly miscalculated and McShane was able to grab a pawn. Howell's queen sacrifice in order to mix matters didn't impress the cool McShane.
Although Viswanathan Anand seemed to be making great progress on the queenside, Hikaru Nakamura managed to keep his position afloat and eventually create kingside counterplay. An exchange sacrifice by the American gave him dangerous threats, which Anand couldn't cope with, despite returning material.
Magnus Carlsen opted for a small pull with opposite bishops. Despite later winning a pawn due to his active king, Carlsen was unable to win with Kramnik defending well.
For much of the game Nigel Short had a positional advantage due to his bishop against Adams's knight. Short also had the sounder pawn structure, and this helped him take the initiative. Towards the end an exchange sacrifice enabled him to break through and fatally weaken White's king.
The fourth round:
|Michael Adams||ENG||2734||0-1||Nigel Short||ENG||2698||71||French Tarrasch|
|Magnus Carlsen||NOR||2826||0.5-0.5||Vladimir Kramnik||RUS||2800||55||Nimzoindian with g3.|
|David Howell||ENG||2633||0-1||Luke McShane||ENG||2671||37||Scotch Opening|
|Viswanathan Anand||IND||2811||0-1||Hikaru Nakamura||USA||2758||49||King's Indian Classical Bayonnet|
Levon Aronian (Armenia, 2802) sat out the fourth round whilst helping out with the live commentary.
Here is the tournament situation so far:
There are 3 points for a win and 1 for a draw in London.
(*Anand will be 42 on the 11th of December).
The details of the earlier rounds follow on below.
|Vladimir Kramnik||RUS||2800||0.5-0.5||Hikaru Nakamura||USA||2758||45||Catalan with ...dxc4|
|Levon Aronian||ARM||2802||0.5-0.5||Luke McShane||ENG||2671||42||Chebanenko Slav|
|Magnus Carlsen||NOR||2826||1-0||David Howell||ENG||2633||40||Spanish with d3|
|Michael Adams||ENG||2734||0.5-0.5||Viswanathan Anand||IND||2811||49||Sicilian Najdorf|
|Nigel Short||ENG||2698||0-1||Vladimir Kramnik||RUS||2800||43||Four Knights Rubinstein|
|Hikaru Nakamura||USA||2758||1-0||Levon Aronian||ARM||2802||54||Queen's Gambit 3...Be7|
|Luke McShane||ENG||2671||0.5-0.5||Magnus Carlsen||NOR||2826||79||Spanish Neo-Archangel|
|David Howell||ENG||2633||0.5-0.5||Michael Adams||ENG||2734||35||Spanish Anti-Marshall|
The third round:
|Levon Aronian||ARM||2802||1-0||Nigel Short||ENG||2698||60||Queen's Indian Defence|
|Magnus Carlsen||NOR||2826||1-0||Hikaru Nakamura||USA||2758||41||Quiet Italian|
|Michael Adams||ENG||2734||0-1||Luke McShane||ENG||2671||61||Spanish with d3|
|Viswanathan Anand||IND||2811||0.5-0.5||David Howell||ENG||2633||65||Slav Defence|
The playing schedule (local time):
Rounds 1 to 3, the 3rd to 5th of December at 2pm.
Round 4 on the 6th of December at 4pm.
(Rest day on the 7th of December)
Rounds 5-8, the 8th to the 11th of December at 2pm.
Round 9 will be on the 12th of December at 12 noon.
For Los Angeles subtract eight hours.
For New York subtract five hours.
For Paris and Madrid, add one hour.
For Moscow add three hours.
For Mumbai add five-and-a-half hours.
For Sydney add eleven hours.
More information from the official site: http://www.londonchessclassic.com/classic.htm